An eye doctor is an Opthamologist. A good idea to go to one every two years or so, btw.

What you want is an Optometrist. For cheap, go to WalMart. Otherwise go to a franchise like Glasses R Us or something. If it's the frames you're concerned about, buy them online. If you don't want coating (meaning you'll get all sorts of flare at night), then they will be way cheaper, too.